package cn.tedu.v3;

import java.io.*;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

/**
 * Version  3.0 升级  双向链接【客户端与服务器相互说话】
 *
 *
 * 优化空间：代码结构
 *
 */

public class Server {
    private ServerSocket serverSocket;
    public Server() {
        try {
            serverSocket = new ServerSocket(8764);
        } catch (BindException e) {
            System.out.println("端口号重复申请，建议换个端口号");
        } catch (IOException e) {
            System.out.println("申请端口号失败...");
        }
    }

    public void start() {
        try {
            while (true) {
                System.out.println("----等待客户端链接----");
                Socket socket = serverSocket.accept();
                System.out.println(socket+"12345");
                String ip = socket.getInetAddress().getHostAddress();
                System.out.println(ip + "客户端链接成功了~~");


                new Thread(new CS(socket)).start();
            }
        } catch (IOException e) {
            System.out.println("服务器端通讯断开了");
        } finally {
        if(serverSocket!=null&&!serverSocket.isClosed()){
            try {
                serverSocket.close();
            } catch (IOException e) {
                System.out.println("服务器关闭失败");
            }
        }

        }
    }

    public static void main(String[] args) {
        new Server().start();
    }
    private class CS implements Runnable {
        private Socket socket;
        private String ip;

        public CS(Socket s) {
            this.socket = s;
            ip = socket.getInetAddress().getHostAddress();
        }

        public void run() {
            PrintWriter pw = null;
            //BufferedReader br = null;
            try {
                //1.定义读入
                BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
                //2.定义写出
                pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
                new Thread(() -> {
                    try {
                        String message;
                        while ((message = br.readLine()) != null) {
                            System.out.println("客户端说" + message);
                            System.out.println("服务器请输入：");
                        }
                    } catch (IOException e) {
                        System.out.println("客户端读入失败！");
                    }
                }).start();

                Scanner input = new Scanner(System.in);

                while (true) {
                    System.out.println(ip + "恭喜你抽中五百万！");
                    String say = input.nextLine();//得到控制台输入值
                    //打印：服务器端说的文本--打印客户端
                    pw.println("服务器说"+say);

                }

            } catch (NullPointerException e) {
                System.out.println("IO流传入对象，有对象为null，立马核对，建议：查看try块中对象可能赋值为null");
            } catch (UnsupportedEncodingException e) {
                System.out.println("客户端或者服务器端：字符集不一致");
            }catch (IOException e) {
                System.out.println("通讯过程中，传输出现错误！");
        }finally {
                if (pw != null)

                        pw.close();

                if (socket!= null&&!socket.isClosed())
                    try {
                        socket.close();
                    } catch (IOException e) {
                        System.out.println("通讯关闭，关闭失败");
                    }
            }
        }
    }
}

